Ieamsaard, J., S. Yammen, P. Muneesawang, and F. E. Sandnes. “Vertical Edge Detection-Based Automatic Optical Inspection of HGA Solder Jet Ball Joint Defects”. ECTI Transactions on Computer and Information Technology (ECTI-CIT), vol. 9, no. 2, Apr. 2016, pp. 173-81, doi:10.37936/ecti-cit.201592.54420.